소비자가구의 양곡구입실태와 소비행위에 관한 조사: 미곡구입실태를 중심으로

유남식 한국농촌경제연구원 1980 농촌경제 Vol.3 No.3

조곡공매 제도의 성과와 발전방향

유남식,이정환 한국농촌경제연구원 1997 농촌경제 Vol.20 No.2

일본의 미곡 수급현황 및 미곡 수급조정대책

유남식 한국농촌경제연구원 1987 농촌경제 Vol.10 No.1

양들이 가는 길, 가봉

兪南植 세계평화교수협의회 1982 廣場 Vol.107 No.-

일반미 산지유통 문제점 및 개선방향

유남식,김명환 中央大學校 食糧資源硏究所 1994 食糧資源硏究所 論文集 Vol.6 No.1

The major objectives of this thesis are to make analysis on the economic feasibility of rice processing complex(RPC) which has been introduced since 1991 by the Korean government and, its location, the selection criteria of RPC operational subject, government supporting measures and the linkages of forward and backward of RPC. It is an incrasing tendency in Korea that the quality of rice is more important criterion than the price of it to rice consumers. Therefore, RPC, a new rice processing system, which improves the quality of rice after harvest and delivers the product to the comsumer directly, is necessary to meet the consumers' need. Wet rice is collected from farmers directly after harvest into a RPC, and the rice is dried, stored, milled in the RPC and sold to the consumer directly . The RPC program is expected to increase the quality of rice as well as to prevent the loss of it after harvest and to solve the labor shortage problem of farm households. This thesis consists of four major parts : problem identification of rice marketing and post harvest prodecure in rice production, economic feasibility of RPC, location analysis of RPC, and RPC operational and government supporting measures. The comparative cost analysis between conventional method and RPC were measured by using current government grain operation cost and field survey data on RPC. The economic return rate(ERR) was measured by using hypothesized RPC balance sheet under the assumption that all the rice produced in Korea is processed at RPC by the year 2022. The location analysis was made by using the long tern trend of rice consumption and rice production by region. Major findings are as follow: 1. The economic benefits of RPC operation are classified as the cost saving in the post harvest processing procedure, the prevention of rice lose, and the price increase by producing high quality of cleaned rice. The total benefits of the RPC operation was estimated at 144,616 won per ton which is equivalent to 11,569 won per bag of 80㎏. The economic return rate of RPC by scale was measured a 47.4% for the RPC handling 7,500 ton of wet rice, 55.2% for the RPC handling 10,000 ton of wet rice respectively. 2. This thesis hypothesizes that most of the post harvest procedure in rice production will be made by RPC by the year 2020. Under this assumption, about 500-650 RPC(10,000-7,500ton scale by wet rice storage capacity) is necessary through out the nation to meet the need. 3. Rice must be dried at once in an adequte time. Therefore, a large qualtity of wet rice can not be dried at one RPC. It is desirable to construct a RPC system separating its function into two; a central RPC and subordinating drying and storage facilities. In this case, the central RPC functions to dry, store, mill, and to pack rice for marketing. 4. To improve the operation capacity of RPC and to reduce the pressure of rice purchasing capital. RPC may deal with bath of government purchased rice produced by farmers. The rapid increase of RPC facilities may result in over competitiveness and over investment. Present government plan constructing 300 RPC by 1997 may be over enthusiastic. Therefore, there is a need readjustment of the plan. At the same time, the drying and storage facilities must be scattered in a proper distance for the convenience rice transportation. 5. To improve the efficiency of RPC, the wet rice collection channel, ensuring the enough quantity of rice for processing, packing the final product, and marketing channel must be linked to RPC operation.

다중안테나 기반 철도 통신에서 채널 정보 오차에 강인한 최대우도 신호 검출

유남식(Namsik Yoo),백종현(Jong-Hyen Baek),최현영(Hyeon-Yeong Choi),김영주(YoungJu Kim),김건엽(GonYop Kim),이경천(Kyungchun Lee) 한국통신학회 2015 한국통신학회 학술대회논문집 Vol.2015 No.06

國民學校 兒童의 試驗不安減小를 위한 減感法 比較硏究

兪南植 한국외국어대학교 교육대학원 1988 교육논총 Vol.4 No.1

보철물의 수명 연구를 위한 온라인 평가 시스템 구축

오남식,박영범,유진주,윤준호,윤승환 대한통합치과학회 2019 대한통합치과학회지 Vol.8 No.1

A survey of dental prosthetic life expectancy is important not only because it provides the evidence of dental prosthodontic insurance benefits, but also because it is an objective standard for the agreement of increasing disputes between patients and dentists. Prospective clinical trial and definite prosthesis evaluation criteria is essential for the validity of prosthesis life survey. However, in Korea, there are very few researches that satisfy these criteria. The purpose of this study is to review the previous life expectancy surveys of the dental prosthesis, and to introduce the criteria used for evaluation of the prosthesis and the evaluation criteria for the newly introduced from the Korean Academy of Prosthodontics. Online evaluation system will also be learned more, which allows new institutions to input, collect and process new evaluation criteria in a convenient way. The data obtained through this system will be used in the future to provide more reliable prosthesis life expectancy survey data. 보철물 수명 조사는 치과 보철 치료의 급여화에 따른 보험 정책 수립 뿐 아니라, 증가하고 있는 환자와 의사와의 분쟁의 조정을 위한 객관적 기준이 되기 때문에 중요하다. 타당성을 만족하는 보철물 수명 조사를 위해 명확한 보철물 평가 기준이 필요하고 이를 통한 전향적인 임상연구가 필수적이다. 하지만 국내에서 보고된 문헌들을 살펴보면 이런 기준을 만족시키는 연구가 매우 적은 것이 현실이다. 이 연구에서는 현재까지 문헌에서 소개된 보철물 수명 조사를 살펴보아 앞으로 지향해야 할 수명 연구의 방향을 알아보고, 보철물 평가를 위해 사용된 기준들과 대한치과보철학회에서 새로 제시한 보철물 평가 기준을 소개하고자 한다. 또한 새로운 평가 기준을 여러 기관에서 편리하게 입력, 수집, 가공할 수 있는 온라인 평가 시스템에 대해 자세히 알아보고 향후 이 시스템을 통해 얻어진 자료를 가지고 보다 객관적이고, 광범위한 샘플을 통해, 보다 신빙성 있는 보철물 수명 자료를 얻는 방법을 소개하고자 한다.

Base Isolator의 제작 및 특성실험

김남식,유춘화,이동근 한국전산구조공학회 1992 전산구조공학 Vol.5 No.4

본 실험에서는 가장 널리 쓰이는 base isolator의 한 종류로서 laminated rubber bearing을 제작하여 정적 및 동적 특성실험을 수행하였다. 앞에서 간략하게 언급한 실험결과에 대한 분석자료는 상부구조물과 기초와의 분리를 목적으로 본 실험에서 제작한 base isolator의 활용가능성을 검증하였다. 일반적으로 base isolator가 갖는 특성을 대부분 포함하고 있지만 본 실험결과에서 얻은 개선점은 i) 수직강성의 보강 ii) mounting plate와의 볼트연결부분 보완 iii) 최대전단변형을 증가시키기 위해 base isolator의 전체높이 조정 등으로 요약할 수 있다.

Synergistic Effect of Bone Marrow-Derived Mesenchymal Stem Cells and Platelet-Rich Plasma on Bone Regeneration of Calvarial Defects in Rabbits

오남식,윤정호,유재흥,최성호,이명현,이상진,송순욱 한국조직공학과 재생의학회 2012 조직공학과 재생의학 Vol.9 No.1

Bone tissue regeneration techniques include tissue engineering approaches which employ mesenchymal stem cells as an osteogenic agent for bone repair. Recent studies have demonstrated that tissue engineering scaffolds and growth factors can support cell proliferation, bone formation, and bone tissue repair in lost bone tissue. Furthermore,many studies have suggested that platelet-rich plasma (PRP) can improve bone regeneration due to the numerous growth factors that it contains. This study was performed to investigate the influence of bone marrow-derived mesenchymal stem cells (BMMSCs) and PRP on bone regeneration of calvarial defects in rabbits. Hydroxyapatite (HA) was used as a scaffold for bone regeneration. There were three groups in this experiment: 1) HA loaded with BMMSCs (HS group), 2) HA loaded with PRP (HP group), and 3) HA loaded with BMMSCs and PRP (HSP group). Bone tissue regeneration techniques include tissue engineering approaches which employ mesenchymal stem cells as an osteogenic agent for bone repair. Recent studies have demonstrated that tissue engineering scaffolds and growth factors can support cell proliferation, bone formation, and bone tissue repair in lost bone tissue. Furthermore,many studies have suggested that platelet-rich plasma (PRP) can improve bone regeneration due to the numerous growth factors that it contains. This study was performed to investigate the influence of bone marrow-derived mesenchymal stem cells (BMMSCs) and PRP on bone regeneration of calvarial defects in rabbits. Hydroxyapatite (HA) was used as a scaffold for bone regeneration. There were three groups in this experiment: 1) HA loaded with BMMSCs (HS group), 2) HA loaded with PRP (HP group), and 3) HA loaded with BMMSCs and PRP (HSP group). Two circular bony defects (6 mm in diameter) were made in rabbit calvaria using a trephine bur. BMMSCs and PRP with a HA scaffold (diameter 5.5 mm, height 3 mm) were applied to each defect. The animals were sacrificed after 2 weeks, 4 weeks and 8 weeks. The level of their ability of osteogenesis was evaluated through histological and histomorphometric analyses. High-quality bone regeneration was observed in the HSP group. The percentage of new bone area around the scaffolds was higher in the HSP group than it was in the other groups (HS and HP group), especially at 8 weeks (HS, 72.5±15 %; HP, 85.8±14 %; HSP, 98.8±2.5%). In addition, the level of bone maturation was higher in the HSP group than in the other groups. The results of this study show that PRP has a positive effect on bone generation. HA with a combination of BMMSCs and PRP can enhance bone regeneration. In addition, the growth factor capacity of PRP may affect the differentiation of BMMSCs and promote bone formation.